Hope this one shows up! You probably can't see the error in the 1976 one, but it has a little metal object showing up in between the ER in liberty that might be a D... not sure.
Thanks for looking at the coins.. The 1946 one has part of the six missing, is that just a damaged coin? The 76 does have a piece of the metal in between the ER that looks like a D..
1) it looks like a 1940 to me, otherwise just a greased die. 2) if there is something between the ER is could be a die break, no biggie
I tried to get a closer picture of this for you.. there is a space between the 0 that you said it was.. Thanks again for all the help with this!